If you do not cut the pipe, how are you going to join the PVC to the cast iron? Especially if you melt the lead joint out? You cannot repour the lead joint without melting the PVC.

: I am going to change out some of the cast iron joints to a toilet I have in my basement with PVC. : What is a simple way of seperating the joints? : Can I heat th pipe and melt the lead out or a do I have to break the pipe?: I do not want to have to break or cut the pipe.\: The pipe is 4'' in diameter and is a 90 degree elbow.